I need the solve for this numerical methods course question

Problem 3 (10 marks) points possible ungraded Let's consider a linear system Ax - Where, A= 1 2 4 12 20 20 602 And, 1 2 fal Write down all the inear equations that they represent. (1 Mark) fb) Use Gaussian elimination to turn it into an upper triangular form. (3 Marks) cl Construct the lower triangular matrix L. (1 Mark) (d) Solve the system from the LU decomposed form. 13 Marks) tel What is the computational complexity for the whole process of Lu decomposition and solving the equations. (2 Maris) Submit Show